This part of IEC 62271 applies to a.c. high-speed earthing switches designed for indoor and outdoor installation and for operation at service frequencies of 50 Hz and 60 Hz on systems having voltages of 550 kV and above.<\/p>\n
High-speed earthing switches described in this standard are intended to extinguish the secondary arc remaining after clearing faults on transmission lines by the circuit-breakers.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 6<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | 1 General 1.1 Scope 1.2 Normative references 2 Normal and special service conditions 3 Terms and definitions 3.1 General terms <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | Figures Figure 1 \u2013 Explanation of a multi-phase auto-reclosing scheme <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 3.2 Assemblies of switchgear and controlgear 3.3 Parts of assemblies 3.4 Switching devices 3.5 Parts of switchgear and controlgear 3.6 Operation 3.7 Characteristics quantities 4 Ratings <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | Figure 2 \u2013 Timing chart of HSES and circuit-breakers <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 5 Design and construction Tables Table 1 \u2013 Standardized values of rated induced currents and voltages <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 6 Type tests Table 2 \u2013 Items to be listed on nameplate of a HSES <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 7 Routine tests 8 Guide to the selection of HSES 9 Information to be given with enquiries, tenders and orders <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 10 Rules for transport, storage, installation, operation and maintenance 11 Safety <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | Annex A (informative) Background information on the use of HSES <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | Figure A.1 \u2013 Single-line diagram of a power system Figure A.2 \u2013 Timing chart of the HSESs in relation to the transmission line circuit-breakers <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | Figure A.3 \u2013 Typical timing chart showing the time between fault initiation and a successful re-close of the transmission line circuit-breakers <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | Table A.1 \u2013 Comparison of earthing switches <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | Table A.2 \u2013 Comparison of a four-legged reactor and HSES <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | Annex B (informative) Induced current and voltage conditions for other cases <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | Figure B.1 \u2013 System condition to explain successive fault Figure B.2 \u2013 Example of waveforms of delayed current zero phenomena <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | Table B.1 \u2013 Preferred values for single-phase earth fault with delayed current zero phenomena in the presence of a successive fault <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | Figure B.3 \u2013 Typical test circuit for electromagnetic coupling test-duty of a HSES with delayed current zero crossings Figure B.4 \u2013 Typical test circuit for electrostatic coupling test-duty of HSES with delayed current zero crossings <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | Table B.2 \u2013 Preferred values for multi-phase earth faults in a double-circuit system Table B.3 \u2013 Preferred values for covering the cases of categories 0 and 1 <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" High-voltage switchgear and controlgear – Alternating current high-speed earthing switches for secondary arc extinction on transmission lines<\/b><\/p>\n |